CCU- Carbon Capture and Utilization

Carbon Capture and utilization is a process which carbon dioxide(CO2) is captured for the purpose of being recycled for further use. The CCU process can offer assistance in global efforts to reduce greenhouse gas(GHG) emissions which are created by major industrial emitters such as coal plants.

EADS-CCU: Integrated SOx & CO2 Capture Technology Process and Products

  • Ammonia is used as the absorbent to capture SOx and CO2 in the flue gas
  • SOx is converted to ammonium sulfate (AS) and CO2 to ammonium bicarbonate (ABC)
  • Byproducts (AS and ABC) are saleable fertilizers. Possible: Food grade CO2, leveling agent for bread
  • Filed 8 Chinese patents and international patent filing in progress.

Pilot Design Parameters

  • Capacity: 100 tpa CO2
  • CO2 capture from a side-stream of flue gas of an existing NH3-based FGD unit at a coal-fired power plant in Zhejiang
  • Testing started in Jan 2022. Completed May 2022

Pilot Performance

  • SO2 ≤ 5mg/Nm3, PM ≤ 5mg/Nm3 (meeting the “ultra low-emission” standard)
  • Ammonia slip: ≤ 8 mg/Nm3
  • CO2 capture: 60-80%
  • Ammonia recovery ≥ 99%
  • Ammonium sulfate spec meets “Ammonium Sulfate Produced by Ammonia Based Desulfurization” (T/CPCIF 0006 2017)
  • Ammonium bicarbonate spec meets “Ammonium Bicarbonate for Agricultural Use” (GB 3559 2001)
Sulfur and Carbon Capture Technology
Pilot Project Available for Tour
Inner Mongolia Demo Unit
Pangea Carbon Capture

Integrated SOx and CO2 Capture vs Traditional Process

Item Limestone FGD with NaOH scrubbing + Amine-based CO2 capture Ammonia-based integrated SOx and carbon capture
Absorbent
CaCO3 & NaOH + Ethanolamine
Ammonia (anhydrous or aqueous)
Byproduct
Gypsum (solid waste) + waste alkaline solution
AS and ABC (fertilizers)
Byproduct utilization
CO2 must be compressed and piped for storage
Direct use as fertilizer
Wastewater
~0.035 t/MWh
No
Solid/liquid waste
Yes
No
CO2 emission
1 ton CO2 per ton of SO2 removed (including carbon footprint due to higher energy consumption)
No
CAPEX *
100%
50~60%
OPEX
100%
40~50%

* CAPEX for limestone/ammonia FGD is not included.